Cysteine post-translational modifications regulate protein interactions of caveolin-3
Cysteine post-translational modifications regulate protein interactions of caveolin-3
复制标题
半胱氨酸翻译后修饰调节 Caveolin-3 的蛋白质相互作用
DOI:
10.1101/2022.09.15.508083
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Ashford F
中科院分区:
文献类型:
--
作者:
Ashford F
Caveolae are small flask‐shaped invaginations of the surface membrane which are proposed to recruit and co‐localize signaling molecules. The distinctive caveolar shape is achieved by the oligomeric structural protein caveolin, of which three isoforms exist. Aside from the finding that caveolin‐3 is specifically expressed in muscle, functional differences between the caveolin isoforms have not been rigorously investigated. Caveolin‐3 is relatively cysteine‐rich compared to caveolins 1 and 2, so we investigated its cysteine post‐translational modifications. We find that caveolin‐3 is palmitoylated at 6 cysteines and becomes glutathiolated following redox stress. We map the caveolin‐3 palmitoylation sites to a cluster of cysteines in its C terminal membrane domain, and the glutathiolation site to an N terminal cysteine close to the region of caveolin‐3 proposed to engage in protein interactions. Glutathiolation abolishes caveolin‐3 interaction with heterotrimeric G protein alpha subunits. Our results indicate that a caveolin‐3 oligomer contains up to 66 palmitates, compared to up to 33 for caveolin‐1. The additional palmitoylation sites in caveolin‐3 therefore provide a mechanistic basis by which caveolae in smooth and striated muscle can possess unique phospholipid and protein cargoes. These unique adaptations of the muscle‐specific caveolin isoform have important implications for caveolar assembly and signaling.
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影响因子:
5
作者:
Harvey RD;Calaghan SC
通讯作者:
Calaghan SC
影响因子:
4.8
作者:
F. Galbiati;D. Volonté;D. Meani;G. Milligan;D. Lublin;M. Lisanti;M. Parenti
通讯作者:
M. Parenti
DOI:
10.1096/fj.15-276493
发表时间:
2015-11
期刊:
FASEB journal : official publication of the Federation of American Societies for Experimental Biology
影响因子:
--
作者:
Reilly L;Howie J;Wypijewski K;Ashford ML;Hilgemann DW;Fuller W
通讯作者:
Fuller W
影响因子:
5
作者:
GUARNIERI, C;FLAMIGNI, F;CALDARERA, CM
通讯作者:
CALDARERA, CM
影响因子:
4.8
作者:
DIETZEN, DJ;HASTINGS, WR;LUBLIN, DM
通讯作者:
LUBLIN, DM